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Carrillo JC, Danneels D, Woldhuis J. Relevance of animal studies in the toxicological assessment of oil and wax hydrocarbons. Solving the puzzle for a new outlook in risk assessment. Crit Rev Toxicol 2021; 51:418-455. [PMID: 34494504 DOI: 10.1080/10408444.2021.1944056] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
Paraffin waxes and white mineral oils are distinct petroleum products separated from a common feedstock by crystallization, where only n-alkanes, iso- and cyclo-alkanes with a linear backbone of ∼ 20 carbon atoms long, selectively crystalize out from the oil to form the wax, which is solid at room temperature, whereas oils remain liquid. Up until the 90's, these differences were reflected in separated regulatory assessments. A paradigm shift occurred when Fischer 344 rats (F-344) developed liver epithelioid granuloma following exposure to low and medium viscosity oils or waxes. This lesion was used as common denominator between these products to be jointly assessed under the common term "mineral hydrocarbons - MHC", obviating compositional differences. This regulatory paradigm dominated for the next 30 years, exacerbated by the EFSA 2012 evaluation using the analytical term "MOSH" (mineral oil saturated hydrocarbons) which encompassed these products under single chromatography fraction. The reconstruction of historical developments, together with recent EFSA-sponsored studies of toxicity and accumulation and supporting literature, has allowed us to understand the etiology of the F-344 rat hepatic epithelioid granuloma, which is presented in an adverse outcome pathway (AOP). Considering chemical composition, it clearly demonstrates that the hepatic effects in F-344 rats caused by linear alkanes of waxes are irrelevant for humans. Waxes are thus not MOSH and should thus be evaluated on their own merit. The term MOSH should not include n-alkanes and be exclusively used to mineral oil fractions when considering their chemical makeup for a relevant human hazard assessment.
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Trimmer GW, Freeman JJ, Priston RAJ, Urbanus J. Results of Chronic Dietary Toxicity Studies of High Viscosity (P70H and P100H) White Mineral Oils in Fischer 344 Rats. Toxicol Pathol 2020; 32:439-47. [PMID: 15204967 DOI: 10.1080/01926230490465865] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
Two-year dietary studies were conducted to determine the chronic toxicity and its reversibility, and the carcinogenicity of P70(H) and P100(H) white mineral oils in Fischer-344 rats (F-344). The studies were identical in design and followed the Organization for Economic Cooperation and Development, Guidelines for Testing Chemicals, Guideline 453, 1981. Additional endpoints evaluated were: (1) extent of mineral hydrocarbon deposition in liver, kidneys, mesenteric lymph nodes, and spleen of female rats at 3, 6, 12, 18 and 24 months, and (2) reversibility of effects following cessation of exposure. Dietary concentration were 60, 120, 240, and 1, 200 mg/kg/day, adjusted periodically to account for bodyweight changes. Study results were consistent with preceding subchronic studies. No treatment-related mortality, neoplastic lesions, or changes in clinical health, hematology, serum chemistry, or urine chemistry were evident in any group administered either white oil. Statistically significant higher food consumption was noted in the 1, 200 mg/kg group males and females exposed to either white oil and statistically significant higher body weights were noted in the 1, 200-mg/kg males during the latter portion of the P100(H) study. Higher mesenteric lymph node weights were accompanied by increased severity of infiltrating histiocytes. This occurred to a greater extent with the P70(H) than the P100(H) oil. No other histopathology of significance was observed. Mineral hydrocarbons were detected in the liver following exposure to either oil. Maximal concentrations of mineral hydrocarbons in the liver were similar with both oils but occurred more rapidly with the P70(H) oil. Liver mineral hydrocarbon content returned to near-background levels during the reversibility phase. In conclusion, lifetime exposer of F344 rats to P70(H) and P100(H) white oils resulted in only minimal findings and with no consequence to clinical health. Thus, under the conditions of these studies, the No Observable Adverse Effect Level (NOAEL) for these studies was considered to be 1, 200 mg/kg/day.
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Affiliation(s)
- Gary W Trimmer
- ExxonMobil Biomedical Sciences, Inc., Annandale, New Jersey, USA
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Carrillo JC, Danneels D. Letter to the editor, regarding the publication by Pirow and colleagues "Mineral oil in food, cosmetic products, and in products regulated by other legislations". Crit Rev Toxicol 2020; 50:272-275. [PMID: 32484074 DOI: 10.1080/10408444.2020.1749830] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Pirow R, Blume A, Hellwig N, Herzler M, Huhse B, Hutzler C, Pfaff K, Thierse HJ, Tralau T, Vieth B, Luch A. Mineral oil in food, cosmetic products, and in products regulated by other legislations. Crit Rev Toxicol 2020; 49:742-789. [PMID: 31939687 DOI: 10.1080/10408444.2019.1694862] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
For a few years, mineral oils and their potential adverse health effects have been a constant issue of concern in many regulatory areas such as food, cosmetics, other consumer products, and industrial chemicals. Analytically, two fractions can be distinguished: mineral oil saturated hydrocarbons (MOSH) and mineral oil aromatic hydrocarbons (MOAH). This paper aims at assessing the bioaccumulative potential and associated histopathological effects of MOSH as well as the carcinogenic potential of MOAH for consumer-relevant mineral oils. It also covers the absorption, distribution, metabolism, and excretion of MOSH and MOAH upon oral and dermal exposures. The use and occurrence of consumer-relevant, highly refined mineral oils in food, cosmetics and medicinal products are summarized, and estimates for the exposure of consumers are provided. Also addressed are the challenges in characterizing the substance identity of mineral oil products under REACH. Evidence from more recent autopsy and biopsy studies, along with information on decreasing food contamination levels, indicates a low risk for adverse hepatic lesions that may arise from the retention of MOSH in the liver. With respect to MOAH, at present there is no indication of any carcinogenic effects in animals dermally or orally exposed to highly refined mineral oils and waxes. Such products are used not only in cosmetics but also in medicinal products and as additives in food contact materials. The safety of these mineral oil-containing products is thus indirectly documented by their prevalent and long-term use, with a simultaneous lack of clinical and epidemiological evidence for adverse health effects.
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Affiliation(s)
- Ralph Pirow
- Department of Chemical and Product Safety, German Federal Institute for Risk Assessment (BfR), Berlin, Germany
| | - Annegret Blume
- Department of Chemical and Product Safety, German Federal Institute for Risk Assessment (BfR), Berlin, Germany
| | - Nicole Hellwig
- Department of Chemical and Product Safety, German Federal Institute for Risk Assessment (BfR), Berlin, Germany
| | - Matthias Herzler
- Department of Chemical and Product Safety, German Federal Institute for Risk Assessment (BfR), Berlin, Germany
| | - Bettina Huhse
- Department of Chemical and Product Safety, German Federal Institute for Risk Assessment (BfR), Berlin, Germany
| | - Christoph Hutzler
- Department of Chemical and Product Safety, German Federal Institute for Risk Assessment (BfR), Berlin, Germany
| | - Karla Pfaff
- Department of Chemical and Product Safety, German Federal Institute for Risk Assessment (BfR), Berlin, Germany
| | - Hermann-Josef Thierse
- Department of Chemical and Product Safety, German Federal Institute for Risk Assessment (BfR), Berlin, Germany
| | - Tewes Tralau
- Department of Chemical and Product Safety, German Federal Institute for Risk Assessment (BfR), Berlin, Germany
| | - Bärbel Vieth
- Department of Chemical and Product Safety, German Federal Institute for Risk Assessment (BfR), Berlin, Germany
| | - Andreas Luch
- Department of Chemical and Product Safety, German Federal Institute for Risk Assessment (BfR), Berlin, Germany
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Otunga GN, Maiyoh GK, Macharia BN, Tuei VC. Transformer mineral oil ingestion induces systemic sub-acute toxicity in Wistar rats. Heliyon 2019; 5:e02998. [PMID: 31867465 PMCID: PMC6906677 DOI: 10.1016/j.heliyon.2019.e02998] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2019] [Revised: 05/20/2019] [Accepted: 12/04/2019] [Indexed: 11/24/2022] Open
Abstract
We investigated the potential toxicities associated with the sub-acute ingestion of transformer mineral oil (TMO) at a heated low dose (HLD-50 mg/kg), heated high dose (HHD-500 mg/kg) and unheated high dose (UHD-500 mg/kg) in Wistar rats. There were increases in red blood cells and haemoglobin levels in HHD females and UHD males respectively versus control. The serum total proteins, albumin, and creatinine of the HHD females showed a significant increase versus control. The HHD males and UHD groups showed significant increase in liver malondialdehyde versus control. The livers of HHD groups had bile duct proliferation while those of HLD females and UHD groups showed focal areas of periportal chronic inflammation. HHD groups had kidneys with mild chronic inflammation and the HHD and UHD groups showed small intestines with chronic inflammation. In conclusion, sub-acute oral administration of TMO induced various degrees of dermal, haematological, hepatic, renal and small-intestinal toxicities in rats.
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Affiliation(s)
- Grace N Otunga
- Department of Chemistry and Biochemistry, School of Science, University of Eldoret, P.O Box 1125-30100, Eldoret, Kenya
| | - Geoffrey K Maiyoh
- Department of Medical Biochemistry, School of Medicine, Moi University, P.O Box 4606-30100, Eldoret, Kenya
| | - Benson N Macharia
- Department of Human Pathology and Forensic Medicine, School of Medicine, Moi University, P.O Box 4606-30100, Eldoret, Kenya
| | - Vivian C Tuei
- Department of Chemistry and Biochemistry, School of Science, University of Eldoret, P.O Box 1125-30100, Eldoret, Kenya
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Van Heyst A, Goscinny S, Bel S, Vandevijvere S, Mertens B, Elskens M, Van Hoeck E. Dietary exposure of the Belgian population to mineral oil. Food Addit Contam Part A Chem Anal Control Expo Risk Assess 2019; 37:267-279. [PMID: 31697201 DOI: 10.1080/19440049.2019.1684573] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
Recently, presence of mineral oil in numerous foods has been detected. The analysis of mineral oil in food is convoluted since it comprises MOSH (saturated hydrocarbons) and variable amounts of mainly alkylated MOAH (aromatic hydrocarbons). Both fractions have a different toxicological profile and therefore they need to be assessed separately. For Belgium, occurrence data are available comprising concentrations of 217 food samples. These data were used, in combination with the 2014/15 Belgian Food Consumption Survey data, in a lower bound scenario to evaluate the dietary exposure of the Belgian population. Exposure to mineral oil was much lower compared to the results previously reported by EFSA and RIVM. The main contributors in Belgium were similar to previous studies (i.e. cereal products and oils), but an important additional contribution of non-alcoholic drinks was identified due to the presence of mineral oil in coffee. However, the concentration of mineral oil was determined from the dry product by applying a dilution factor with transfer rate of 100%, and not in the prepared coffee.This study gives an account of the dietary exposure of the Belgian population to mineral oil for the first time and reports the associated uncertainties.
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Affiliation(s)
| | | | - Sarah Bel
- Sciensano, SD Epidemiology and Public Health, Brussels, Belgium
| | | | - Birgit Mertens
- Sciensano, SD Chemical and Physical Health Risks, Brussels, Belgium
| | - Marc Elskens
- Department of Analytical and Geochemistry, Vrije Universiteit Brussel, Brussels, Belgium
| | - Els Van Hoeck
- Sciensano, SD Chemical and Physical Health Risks, Brussels, Belgium
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Grob K. Toxicological Assessment of Mineral Hydrocarbons in Foods: State of Present Discussions. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2018; 66:6968-6974. [PMID: 29953221 DOI: 10.1021/acs.jafc.8b02225] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The evaluation of mineral oils by the Joint FAO/WHO Expert Committee on Food Additives (JECFA) provided high acceptable daily intakes for classes largely falling into the mass range strongly accumulated by humans. Because they are roughly 2 orders of magnitude above the present exposure, they authorize strongly increased exposure. An approach based on accumulation seems more adequate. Increased organ weights might be more critical than granulomas. Aromatic hydrocarbons with 1-2 aromatic rings should be distinguished from those with at least 3 aromatic rings. If mineral oil saturated hydrocarbon limits were low, no limit might be needed for the 1-2 ring aromatics. It should be considered to phase out substantial use of mineral oils in food application.
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Affiliation(s)
- Koni Grob
- Kantonales Labor (Official Food Control Authority of the Canton of Zurich) , Fehrenstrasse 15 , CH-8032 Zürich , Switzerland
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Mori H, Cardiff RD, Borowsky AD. Aging Mouse Models Reveal Complex Tumor-Microenvironment Interactions in Cancer Progression. Front Cell Dev Biol 2018; 6:35. [PMID: 29651417 PMCID: PMC5884881 DOI: 10.3389/fcell.2018.00035] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2018] [Accepted: 03/15/2018] [Indexed: 12/15/2022] Open
Abstract
Mouse models and genetically engineered mouse models (GEMM) are essential experimental tools for the understanding molecular mechanisms within complex biological systems. GEMM are especially useful for inferencing phenocopy information to genetic human diseases such as breast cancer. Human breast cancer modeling in mice most commonly employs mammary epithelial-specific promoters to investigate gene function(s) and, in particular, putative oncogenes. Models are specifically useful in the mammary epithelial cell in the context of the complete mammary gland environment. Gene targeted knockout mice including conditional targeting to specific mammary cells can reveal developmental defects in mammary organogenesis and demonstrate the importance of putative tumor suppressor genes. Some of these models demonstrate a non-traditional type of tumor suppression which involves interplay between the tumor susceptible cell and its host/environment. These GEMM help to reveal the processes of cancer progression beyond those intrinsic to cancer cells. Furthermore, the, analysis of mouse models requires appropriate consideration of mouse strain, background, and environmental factors. In this review, we compare aging-related factors in mouse models for breast cancer. We introduce databases of GEMM attributes and colony functional variations.
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Affiliation(s)
- Hidetoshi Mori
- Center for Comparative Medicine, University of California, Davis, Davis, CA, United States
| | - Robert D Cardiff
- Center for Comparative Medicine, University of California, Davis, Davis, CA, United States.,Department of Pathology and Laboratory Medicine, School of Medicine, University of California, Davis, Davis, CA, United States
| | - Alexander D Borowsky
- Center for Comparative Medicine, University of California, Davis, Davis, CA, United States.,Department of Pathology and Laboratory Medicine, School of Medicine, University of California, Davis, Davis, CA, United States
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Adenuga D, Goyak K, Lewis RJ. Evaluating the MoA/human relevance framework for F-344 rat liver epithelioid granulomas with mineral oil hydrocarbons. Crit Rev Toxicol 2017; 47:750-766. [DOI: 10.1080/10408444.2017.1319336] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Affiliation(s)
- David Adenuga
- ExxonMobil Biomedical Sciences, Inc., Annandale, NJ, USA
| | - Katy Goyak
- ExxonMobil Biomedical Sciences, Inc., Annandale, NJ, USA
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Knutsen HK, Alexander J, Barregård L, Bignami M, Brüschweiler B, Ceccatelli S, Cottrill B, Dinovi M, Edler L, Hogstrand C, Hoogenboom LR, Nebbia C, Oswald I, Petersen A, Rose M, Roudot AC, Schwerdtle T, Vollmer G, Wallace H, Grasl-Kraupp B, Grob K, Penninks A, Binaglia M, Roldán Torres R, Vleminckx C. Scientific opinion on the evaluation of substances as acceptable previous cargoes for edible fats and oils. EFSA J 2017; 15:e04656. [PMID: 32625253 PMCID: PMC7009818 DOI: 10.2903/j.efsa.2017.4656] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Shipping of edible fats and oils into Europe is permitted in bulk tanks, provided that the previous cargo is included in a positive list. The European Commission requested EFSA to evaluate the acceptability as previous cargoes for fats and oils the substances calcium lignosulphonate, methyl acetate, ethyl tert‐butyl ether (ETBE) and ammonium sulphate. The evaluation was based on the same criteria as those used for the evaluation of the substances currently on the list in the Annex to Commission Directive 96/3/EC as acceptable previous cargoes for edible fats and oils. Methyl acetate and ETBE meet the criteria for acceptability as previous cargoes. Due to uncertainties, mainly with regard to the composition and toxicity of the low molecular mass fraction, and the fact that the toxicological database is limited to the 40–65 grade and does not cover all grades of calcium lignosulphonate shipped as previous cargoes, the EFSA Panel on Contaminants in the Food Chain (CONTAM Panel) concluded that calcium lignosulphonate does not meet the criteria for acceptability as a previous cargo. Only food‐grade ammonium sulphate meets the criteria for acceptability as a previous cargo due to uncertainties about impurities in other (non‐food) grades.
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Boogaard PJ, Carrillo JC, Roberts LG, Whale GF. Toxicological and ecotoxicological properties of gas-to-liquid (GTL) products. 1. Mammalian toxicology. Crit Rev Toxicol 2016; 47:121-144. [DOI: 10.1080/10408444.2016.1214676] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Peter J. Boogaard
- Shell Health – Risk Sciences Team, Shell International B.V., The Hague, The Netherlands
| | - Juan-Carlos Carrillo
- Shell Health – Risk Sciences Team, Shell International B.V., The Hague, The Netherlands
| | - Linda G. Roberts
- Reproductive Toxicology Issues & Petroleum Toxicology, Chevron Energy Technology Company, San Ramon, CA, USA
| | - Graham F. Whale
- Shell Health – Risk Sciences Team, Shell International Ltd, Manchester, UK
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12
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Barp L, Kornauth C, Wuerger T, Rudas M, Biedermann M, Reiner A, Concin N, Grob K. Mineral oil in human tissues, Part I: Concentrations and molecular mass distributions. Food Chem Toxicol 2014; 72:312-21. [DOI: 10.1016/j.fct.2014.04.029] [Citation(s) in RCA: 54] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2014] [Revised: 04/10/2014] [Accepted: 04/12/2014] [Indexed: 10/25/2022]
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McKee RH, Drummond JG, Freeman JJ, Letinski DJ, Miller MJ. Light White Oils Exhibit Low Tissue Accumulation Potential and Minimal Toxicity in F344 Rats. Int J Toxicol 2012; 31:175-83. [DOI: 10.1177/1091581811432940] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Female F344 rats were fed diets containing 0.02%, 0.2%, or 2.0% white mineral oil for 90 days. There were no gross or microscopic differences in target organs at the 0.02% level. In the higher-dose groups, relative liver and mesenteric lymph node (MLN) weights were increased, and MLN inflammation was observed. At the 2% level, there was very limited evidence of microgranuloma formation in the liver but at a lower incidence and at lesser severity than has been reported in studies of C22 -C25 oils. Analysis of liver extracts from treated rats revealed that C15 -C20 constituents were underrepresented by comparison to their corresponding concentrations in the test oil. These results provide evidence that although hydrocarbons with carbon numbers <C20 are absorbed, they are not preferentially retained and do not contribute to inflammatory processes in liver.
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Affiliation(s)
- Richard H. McKee
- ExxonMobil Biomedical Sciences, Toxicology and Environmental Sciences, Inc, Annandale, NJ, USA
| | - John G. Drummond
- ExxonMobil Biomedical Sciences, Toxicology and Environmental Sciences, Inc, Annandale, NJ, USA
| | - James J. Freeman
- ExxonMobil Biomedical Sciences, Toxicology and Environmental Sciences, Inc, Annandale, NJ, USA
| | - Daniel J. Letinski
- ExxonMobil Biomedical Sciences, Toxicology and Environmental Sciences, Inc, Annandale, NJ, USA
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